Title:
BATTERY RESIDUAL LEVEL ALARM APPARATUS, NUMERICAL CONTROL APPARATUS AND MACHINE TOOL SYSTEM
Document Type and Number:
Japanese Patent JP2018132318
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a battery residual level alarm apparatus capable of properly predicting the life of a battery for backup of a memory device to generate an alarm.SOLUTION: In a step S1, an operating environment temperature T1 of a battery and an inter-terminal voltage V1 at a power supply turning-on time of a numerical controller are measured. In a step S2, an operating environment temperature T2 of the battery and an inter-terminal voltage V2 at a power supply turning-off time of the numerical controller are measured. In a step S3, it is determined whether or not a change rate R obtained by dividing a voltage difference ΔV between the two terminal voltages V1 and V2 by a temperature difference ΔT exceeds a predetermined change rate threshold value RT. If the change rate R exceeds the change rate threshold value RT, an alarm is generated in a step S4 to indicate that a remaining battery level is low. Further, in a step S5, a power supply turning-off operation of the numerical controller is suspended.SELECTED DRAWING: Figure 5
Inventors:
MATSUDA YUICHI
Application Number:
JP2017023993A
Publication Date:
August 23, 2018
Filing Date:
February 13, 2017
Export Citation:
Assignee:
FANUC LTD
International Classes:
G01R19/165; G01R31/36; G05B19/18; H01M10/48
Domestic Patent References:
| JPH07120508A | 1995-05-12 | |||
| JPH0634728A | 1994-02-10 | |||
| JP2009080104A | 2009-04-16 | |||
| JP2008289220A | 2008-11-27 | |||
| JP2016223964A | 2016-12-28 |
Foreign References:
| WO2012143996A1 | 2012-10-26 |
Attorney, Agent or Firm:
Masayuki Masabayashi
Tetsuo Shiba
Hiroaki Hoshino
Tetsuo Shiba
Hiroaki Hoshino